emptyData1 = readfid('./data/fid_empty5', 1);
emptyData2 = readfid('./data/fid_empty5', 2);
emptyData3 = readfid('./data/fid_empty5', 3);
emptyData4 = readfid('./data/fid_empty5', 4);

chstd(1) = std(emptyData1);
chstd(2) = std(emptyData1);
chstd(3) = std(emptyData1);
chstd(4) = std(emptyData1);

figure(10)
plot(chstd);
title('STD of Noise of channel');
figure(11)
chSNR = 1;  % make the value correct
plot(chSNR);
title('SNR of channels at 1.5mm');

figure(12)
subplot(4,1,1)
plot(emptyData1)
subplot(4,1,2)
plot(emptyData2)
subplot(4,1,3)
plot(emptyData3)
subplot(4,1,4)
plot(emptyData4)